Veri*Lite Deadend & Suspension Insulators for 15-69kV Applications

Transcription

1 Veri*Lite Deadend & Suspension Insulators for -69kV Applications Section Warranty - Material Hubbell Power Systems, Inc. warrants all products sold by it to be merchantable (as such term is defined in the Uniform Commercial Code) and to be free from defects in material and workmanship. Buyer must notify the Company promptly of any claim under this warranty. The Buyer's exclusive remedy for breach of this warranty shall be the repair or replacement, F.O.B. factory, at the Company's option, of any product defective under the warranty which is returned to the Company within one year from the date of shipment. NO OTHER WARRANTY, WHETHER EXPRESS OR ARISING BY OPERATION OF LAW, COURSE OF DEALING, USAGE OF TRADE OR OTHERWISE IMPLIED, SHALL EXIST IN CONNECTION WITH THE COMPANY'S PRODUCTS OR ANY SALE OR USE THEREOF. The Company shall in no event be liable for any loss of profits or any consequential or special damages incurred by Buyer. The Company's warranty shall run only to the first Buyer of a product from the Company, from the Company's distributor, or from an original equipment manufacturer reselling the Company's product, and is non-assignable and non-transferable and shall be of no force and effect if asserted by any person other than such first Buyer. This warranty applies only to the use of the product as intended by Seller and does not cover any misapplication or misuse of said product. Warranty - Application Hubbell Power Systems, Inc. does not warrant the accuracy of and results from product or system performance recommendations resulting from any engineering analysis or study. This applies regardless of whether a charge is made for the recommendation, or if it is provided free of charge. Responsibility for selection of the proper product or application rests solely with the purchaser. In the event of errors or inaccuracies determined to be caused by Hubbell Power Systems, Inc., its liability will be limited to the re-performance of any such analysis or study. Index Page Deadend & Suspensions Design Features Applications Mechanical Ratings Insulation Coordination , 22-3 Packaging Sample Polymer Specification Mechanical Characteristics , 22-6 Electrical Characteristics, Key , 22-6 End Fitting Details VLS Insulator NOTE: Because Hubbell has a policy of continuous product improvement, we reserve the right to change design and specifications without notice. Copyright 2006 Hubbell/Ohio Brass Printed in USA RGS 10M

2 22-2 The Veri*Lite Insulators in this publication embody the latest features available in polymer insulator design and manufacture. Ohio Brass began its efforts in polymer research in the early 1900s. After years of production and research with organic com in the high voltage insulation field, Ohio Brass introduced the Hi*Lite insulator in A decade later the Ohio Brass polymer distribution arrester, PDV-100, was introduced as the first U.S. made polymer-housed MOV arrester. Today s Veri*Lite insulators add to the 20 million distribution arresters and over 19 million polymer insulators already in service. These numbers show OB s dedication in providing a quality product for the electric utility industry. Design The structural design of the Veri*Lite insulator consists of three basic parts: Rod - Veri*Lite insulator fiberglass rod is produced from the highest quality materials. Strands are aligned for the maximum tensile strength. The rod is filled 57 percent, by volume, with electrical grade glass fibers. End Fittings - Ferrous end fittings are crimped directly to the fiberglass rod by a process originated by Ohio Brass. The crimp requires no intermovement of the parts to achieve high strength, nor does it introduce potting com or adhesives. Weathersheds - Veri*Lite insulators are manufactured with ESP TM silicone alloy rubber, the same proven material used in PDV arresters and Hi*Lite insulators. ESP is a polymer compound made by alloying silicone and EPDM rubber. This alloy offers the desirable toughness and resistance to tracking of our original EPR, with the hydrophobic characteristics derived from low molecular weight silicone oils. Ohio Brass uses several tests to evaluate materials. Tracking, QUV, corona cutting, salt fog, oxidative stability and variations of differential thermal analysis tests assure the quality of OB s shed material. For further information on our polymers ask your Ohio Brass representative for the publication Polymer Materials for Insulator Weathersheds EU126-H. Leakage Distance Veri*Lite insulators feature high leakage distance for optimum contamination performance. Washability The Veri*Lite insulators listed in this catalog are suitable for washing by all known methods in current use. Washing tests have been conducted with high-pressure equipment at close nozzle-to-insulator distances. No water intrusion occurred, with multiple washings. Standards Veri*Lite suspension insulators meet the latest ANSI/ IEEE-102, CEA LWIWG-01, and IEC standards. Ohio Brass manufacturing facilities are registered for successful implementation of a quality system in accordance with ISO Mechanical Ratings Specified Mechanical Load (SML) ratings for the insulators are with ferrous end fittings. A Routine Test Load value (RTL) is assigned to each insulator. This is 50 percent of the SML rating. A Proof Test is applied at the factory of. This test load is higher than the recommended RTL to help ensure the quality of our product. Markings Markings are permanently embossed into the end fittings or polymer housing. These include the SML, assembly date code and Ohio Brass identification. Equivalency Even though porcelain specifications are written around strings of individual units, it s an easy matter to select Veri*Lite insulators for equivalency. This involves reviewing designs for the following: ELECTRICAL Compare porcelain to Veri*Lite leakage distance. Compare porcelain to Veri*Lite section length. MECHANICAL Compare porcelain M&E to Veri*Lite SML. Insulation Coordination The operating performance of a distribution or transmission line depends on its insulation level. It must not flashover under practically any operating condition. Several methods of coordination of line and station insulation have been proposed. Generally, the best method is to establish a definite common insulation level for all the station insulation and then match that level with the line insulation. With this approach, the

3 22-3 task is limited to three fundamental requirements: 1. Selection of the basic impulse insulation level (BIL). 2. Specification of insulation with flashover characteristics equal to or greater than the selected BIL. 3. The application of suitable overvoltage surge protection. Satisfactory performance is generally achieved with an insulator which has a dry 60 Hz flashover of three to five times the phase-to-ground voltage and a leakage distance approximately twice the shortest air-gap (strike) distance. Packaging Veri*Lite insulator standard packing is cartons on pallets. Purpose: To ensure a suitable service life of polymer insulating materials. I. Material Design Tests - The following must be performed to certify a material for use in production. 1. Tracking test: Performed on a sample of material inclined at 30 and electrodes positioned mm apart. Samples are sprayed with a conductive solution (00Ωcm) and energized at 10kV. The cycle is repeated every 90 seconds. The sample passes if there is: 1. No carbonization or tracking. 2. No erosion through sample. 3. No leakage current flow at the end of 90 seconds. The sample must withstand 20,000 test cycles. 2. Ultraviolet Test: Samples of the rubber must be tested in a QUV tester or equivalent cyclic weatherometer. The samples are exposed to high ultraviolet radiation and high humidity without cracking, checking or becoming hydrophilic. The sample is judged to have passed this test if it exceeds,000 hours of exposure without damage. 3. Corona Cutting: Samples 5 cm by 7 cm are subjected to mechanical stress of 300,000 microstrain by bending samples around a grounded electrode. A needle-like electrode is placed 1 mm from the surface of the sample and energized at 12 kv in a controlled humidity chamber. The sample is judged to have passed this test if there is no splitting or cutting. Samples must pass 1,000 hours of exposure to this test.. Oxidative Stability: Samples of the polymer compound are tested using differential scanning calorimetry. Samples are heated rapidly in a nitrogen atmosphere to the test temperature of 200 C. The atmosphere is then changed to air and the temperature is maintained until the antioxidant is consumed, as measured by an exothermic chemical reaction. The time for this reaction to occur must exceed 300 minutes. 5. Tear Strength: Rubber test slabs are prepared in accordance with ASTM Standards and are tested to determine tear strength of the material. The minimum acceptable tear strength is 125 lb./in. II. Other Requirements Sample Polymer Specification - The manufacturer must supply upon request a listing of routine tests performed to ensure production compliance with design tests.

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